On the ecology and behavior of Cebus albifrons in eastern Colombia: I. Ecology

Abstract

A-503 contact-hr study of a 35-member group of Cebus albifrons was conducted in eastern Colombia in 1977 and 1978. The group had a female: male socionomic sex ratio of 2.5:1 and used a home range of 110-120 ha which overlapped the home range of another group of C. albifrons about 20-30 ha. The animals spent about 80% of their foraging time eating plant material and about 20% of their foraging time eating animal materials. A birth peak at the end of the dry season extending into the wet season was indicated by data available. Attempted predation was recorded by the mustelid Eira barbara and the black-and-white hawk-eagle Spizastur melanoleucus. Some association was observed with the red howler monkey Alouatta seniculus. The group at times spent more than half the day foraging and traveling on the ground, exhibiting a level of terrestriality not reported for other New World primates. © 1979 Japan Monkey Centre.